Hi I'm running LDD 3 and Civil 3, next week we get 2005 W/Civil 3D. Can't wait. Anyways, I'm dealing with a mess of 3D polylines and block references that are very close to each other. Basically 2 sets of contours. They are from Microstation and are on the same layer. Is there any way to isolate the blocks to delete the blocked lines without erasing the 3D lines? Presently I'm selecting them one at a time and erasing them. 2 different contour sets the blocks are 1.5 feet too low and they run right next to the 3D polys. THanks for the help on this. Heidi